//  read_texture() - read in an image file in SGI 'libimage' format
// 	currently its very simple minded and converts all images
//  to RGBA8 regardless of the input format and returns the
//	original number of components in the appropriate parameter.    
//     
//	the components are converted as follows
//	L    -> LLL 1.0
//	LA   -> LLL A
//	RGB  -> RGB 1.0
//	RGBA -> RGB A

unsigned * read_rgb_texture(const char *name, int *width, int *height, int *components);

unsigned * read_tga_texture(char *name, int *width, int *height, int *components);